Could you explain a situation where you faced difficulties in building a relationship with a crucial person and how you ultimately succeeded? How would you go about building a relationship with a difficult stakeholder at Zetwerk?

Interview question asked to Engineering Managers interviewing at Zetwerk: Could you explain a situation where you faced difficulties in building a relationship with a crucial person and how you ultimately succeeded? How would you go about building a relationship with a difficult stakeholder at Zetwerk?.